Two people were shot by US Customs and Border Protection agents Thursday afternoon near East Burnside and 141st Avenue in Portland and were believed to be alive, according to city officials. The FBI is reported to be leading the investigation into the federal agents use of force.

PORTLAND, OR (2 minute read) — Federal officials and local leaders are working to piece together what happened after US Customs and Border Protection agents shot two people Thursday afternoon in east Portland. The encounter took place near East Burnside Street and 141st Avenue, a busy area where residents regularly walk, drive and use nearby businesses.

Portland City Council President Elana Pirtle Guiney said she had been briefed that two people were struck by gunfire but as of her latest information both were still alive. Details about what led up to the shooting, who fired first, or what prompted agents to draw a firearm had not yet been made public.

According to sources who spoke with ABC News, the Federal Bureau of Investigation is leading the review of the shooting. That is common when federal agents discharge a firearm and someone is seriously hurt, since the investigation must examine whether the use of force followed federal policy and the law. These reviews often look at whether agents reasonably believed there was an immediate threat of death or serious injury before they fired.

This is a developing story.